Vibration Feed-Back Control Of Marine Smart Structure

The analysis and numerical imitation of vibration feedback control of smart marine structure was studied in this dissertation. The analytical program exploitations was carried through, including compiling and editing the smart structure FEA code on Visual Fortran, and the secondary exploiting for smart structure analysis on commercial software ANSYS, as the insufficiency of the capability of smart structure analysis and control imitation in commercial finite element analysis software. And the programs developed were used to investigate the vibration feed-back control of marine smart structure.First of all, the construction of smart structure and the characteristics and constitution mechanism of the component materials was described. And the direct and inverse piezoelectric effect and equations were stated.Because there was no piezoelectric shell element in current commercial software, it would be difficult to analyze the smart marine structure. In this paper, a four-node composite plate element with extension and bending displacement and electrical degrees of freedom was established, and a finite element analysis program of smart structure was compiled by Visual Fortran. The in plane and out plane deflection of the composite laminate bearing the mechanical and electrical load could...